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Intra-Node Contention in Dynamic Photonic Networks

Intra-Node Contention in Dynamic Photonic Networks,10.1109/JLT.2010.2101048,IEEE/OSA Journal of Lightwave Technology,Mark D. Feuer,Sheryl L. Woodward,

Intra-Node Contention in Dynamic Photonic Networks   (Citations: 2)
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Dynamic photonic networks rely on colorless, non-directional Reconfigurable Optical Add/Drop Multiplexer (ROADM) nodes to enable rapid re-routing of wavelength chan- nels without optoelectronic conversion. We report numerical simulations of the wavelength contention that can occur in such multi-degree ROADM nodes. Intra-node blocking rates and transponder utilization are computed for node designs with and without a client-side fiber cross-connect, and both are compared to results predicted for an ideally contention-free ROADM. Index Terms—Optical network management, photonic net- works, reconfigurable optical add/drop multiplexers (ROADMs).
Journal: IEEE/OSA Journal of Lightwave Technology - J LIGHTWAVE TECHNOL , vol. 29, no. 4, pp. 529-535, 2011
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    • ...After that, the scientific community showed a growing interest in this topic, and numerous works have been and are being published exploring the multiple alternatives in the design of more versatile ROADMs [6]‐[19]...
    • ...Still, none of the works [6]‐[17] addressed in any form the performance side of the question: how the possible internal blocking brought by the ROADM architectural choice may reducethetrafficthatthenetworkcancarry?Theonlyworksinthe literature,tothebestoftheauthors’knowledge,thatinvestigates asomewhatrelatedtopicunderaperformance-wiselight,arethe ones in [18] and [19]...
    • ...The testing scenario is a network with dynamic (random) arrivals of lightpathdemands.The workin[19]evaluatesthelightpathblocking caused by internal contention in a directionless and colorless node, alsounder dynamic lightpathdemands arrivingrandomly...
    • ...The work in [19] differs from this work in two key aspects: (i) we assume an offline planning case, when the demands are known in advance, (ii) we investigate on how an appropriate RWA planning can reduce the add/drop contention effects...
    • ...Interestingly, our results contradict the ones in [19], in the sense that factors and suffice to make the nodes behave as contentionless ROADMs...

    Pablo Pavon-Marinoet al. Dimensioning the Add/Drop Contention Factor of Directionless ROADMs

    • ...In some, transponders are partitioned into several pools and each pool is interconnected to the remaining node structure via a WSS, preventing the simultaneous utilization of the same wavelength by two or more transponders of the same pool [5]...

    Joao Pedroet al. Towards fully flexible optical node architectures: Impact on blocking ...

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